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Finding the Fourth Proportional to 3,188.77, 4,782.85 and 997.31

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Solution

The fourth proportional to 3,188.77, 4,782.85 and 997.31 is: 1,495.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,188.77 : 4,782.85 = 997.31 : x
  2. Step 2: Convert to fraction form
    3,188.77/4,782.85 = 997.31/x
  3. Step 3: Cross multiply
    3,188.77x = 4,782.85 × 997.31
  4. Step 4: Simplify right side
    3,188.77x = 4,769,993.60
  5. Step 5: Solve for x
    x = 4,769,993.60/3,188.77
  6. Step 6: Final answer
    x = 1,495.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.